The income statement shows that interest expenses account for 3.1% of operating profit in 2021, with a very low burden. The cost of 2022Q2 suddenly soared by 33%, mainly due to a sharp increase in sales, management and R & D expenses, which led to a decline in operating profit in the quarter, but the lower increase in Q1 expenses may be due to seasonal factors, such as the timing of bonus payments will greatly affect the quarterly data.